7.  Check the pin numbers of HDD LED connectors. 
Pin 1  Device 1 Power LED -  Pin 2  Device 1 Power LED + 
Pin 3  Device 1 Access LED + Pin 4  Device 1 Access LED -
Pin 5  Device 2 Power LED -  Pin 6  Device 2 Power LED + 
Pin 7  Device 2 Access LED + Pin 8  Device 2 Access LED -
Pin 9  Device 3 Power LED -  Pin 10 Device 3 Power LED + 
Pin 11  Device 3 Access LED + Pin 12 Device 3 Access LED -
Pin 13  Fail LED -  Pin 14 Fail LED + 
Pin 15  N/A  Pin 16 N/A 
Pin 17  Reset -  Pin 18 Reset + 
8.  Plug HDD LED cables into connectors properly. The green wire 
should be at the upper side. The LED cables can be separated to 
three groups. Each group contains one yellow LED (HDD access) 
and one green LED (power). 
Chenbro Micom CO., LTD. 
15Fl., No. 150, Jian Yi Road, Chung Ho City, 
Taipei Hsien, Taiwan, R.O.C. 
Tel: +886-2-8226-5500 
www.chenbro.com.tw 
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RM21400 Chassis Installation Reference Guide